<template>
    <div class="modify-avatar">
      <div class="old">
        <p>原头像</p>
        <div class="avatar">
          <img :src="avatar" alt="">
        </div>
      </div>
      <div class="cut">
        <vueCropper ref="cropper" :img="option.img" :output-size="option.size" :output-type="option.outputType" :info="true" :full="option.full"
                     :can-move="option.canMove" :can-move-box="option.canMoveBox" :fixed-box="option.fixedBox" :original="option.original"
                     :auto-crop="option.autoCrop" :auto-crop-width="option.autoCropWidth" :auto-crop-height="option.autoCropHeight" :center-box="option.centerBox"
                     @real-time="realTime" :high="option.high"
                     @img-load="imgLoad" ></vueCropper>
      </div>
      <div class="content">
        <div class="show-preview" :style="{'width': previews.w + 'px', 'height': previews.h + 'px',  'overflow': 'hidden', 'margin': '5px'}">
          <div :style="previews.div">
            <img :src="previews.url" :style="previews.img">
          </div>
        </div>
        <div class="opt">
          <label class="btn" for="uploads">上传图片</label>
          <input type="file" id="uploads" style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg"
                 @change="uploadImg($event,1)">
          <el-button type="primary" @click="finish">保存</el-button>
        </div>
      </div>
    </div>
</template>

<script>
  import { VueCropper } from 'vue-cropper'
  export default {
    name: "ModifyAvatar",
    data(){
      return {
        avatar:'',
        model: false,
        modelSrc: '',
        crap: false,
        previews: {},
        lists: [
          {
            img: 'https://qn-qn-kibey-static-cdn.app-echo.com/goodboy-weixin.PNG'
          },
          {
            img: 'https://avatars2.githubusercontent.com/u/15681693?s=460&v=4'
          }
        ],
        option: {
          img: '',
          size: 1,
          full: false,
          outputType: 'png',
          canMove: true,
          fixedBox: false,
          original: false,
          canMoveBox: true,
          autoCrop: true,
          // 只有自动截图开启 宽度高度才生效
          autoCropWidth: 200,
          autoCropHeight: 200,
          centerBox: false,
          high: true
        },
        show: true
      }
    },
    created(){
      this.getUser();
    },
    methods:{
      // 实时预览函数
      realTime(data) {
        this.previews = data
        console.log(data)
      },
      imgLoad(msg) {
        console.log(msg)
      },
      getUser(){
        this.axios.post('/api/auth/me').then(res=>{
          if(res.data.data.avatar){
            this.avatar = this.cdn + res.data.data.avatar
          }
          else{
            this.avatar = this.default_avatar;
          }
        }).catch(err=>{
          this.$message.error(err.response.data.message)
        });
      },
      uploadImg(e,num){
        console.log(e.target.files);
        var file = e.target.files[0]
        if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
          alert('图片类型必须是.gif,jpeg,jpg,png,bmp中的一种')
          return false
        }
        var reader = new FileReader()
        reader.onload = (e) => {
          let data
          if (typeof e.target.result === 'object') {
            // 把Array Buffer转化为blob 如果是base64不需要
            data = window.URL.createObjectURL(new Blob([e.target.result]))
          } else {
            data = e.target.result
          }
          if (num === 1) {
            this.option.img = data
          } else if (num === 2) {
            this.example2.img = data
          }
        }
        // 转化为base64
        // reader.readAsDataURL(file)
        // 转化为blob
        reader.readAsArrayBuffer(file)
      },
      finish(){
        this.$refs.cropper.getCropData((data) => {
          let file = this.dataURLtoFile(data,'avatar.png')
          let form = new FormData();
          form.append('upload_key','files')
          form.append('files',file)
          this.axios.post('/api/admin/common/upload',form).then(res=>{
            //this.avatar = res.data.data.avatar_url;
            console.log(res);
            this.updateUserAvatar(res.data.data[0])
          }).catch(err=>{
            this.$message.error(err.response.data.message)
          });

        })
      },
      updateUserAvatar(url){
        this.axios.post('/api/admin/user/modify-avatar',{
          avatar:url
        }).then(res=>{
          this.avatar = res.data.data.avatar_url;
          this.$message({
            type:'success',
            message:'更新成功'
          })
        }).catch(err=>{
          this.$message.error(err.response.data.message);
        })
      },
      dataURLtoFile(dataurl, filename) {//将base64转换为文件
        var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
          bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
        while(n--){
          u8arr[n] = bstr.charCodeAt(n);
        }
        return new File([u8arr], filename, {type:mime});
      }
    },
    components:{
      VueCropper
    },
  }
</script>

<style scoped lang="css">

  .modify-avatar{
    display: flex;
    justify-content: center;
  }
  .avatar img{
    width: 200px;
    height: 200px;
  }
  .old{
    width: 200px;
    height: 200px;
  }
  .show-preview{
    border: #c0ccda solid 1px;
  }
  .cut {
    width: 400px;
    height: 400px;
    margin: 10px 10px;
  }

  .c-item {
    max-width: 800px;
    margin: 10px auto;
    margin-top: 20px;
  }

  .content {
    margin-left: 10px;
    max-width: 1200px;
    margin-top: 10px;
  }

  .test-button {
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
  }

  .btn {
    display: inline-block;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    background: #fff;
    border: 1px solid #c0ccda;
    color: #1f2d3d;
    text-align: center;
    box-sizing: border-box;
    outline: none;
    margin:20px 10px 0px 0px;
    padding: 9px 15px;
    font-size: 14px;
    border-radius: 4px;
    color: #fff;
    background-color: #50bfff;
    border-color: #50bfff;
    transition: all .2s ease;
    text-decoration: none;
    user-select: none;
  }

  .des {
    line-height: 30px;
  }

  code.language-html {
    padding: 10px 20px;
    margin: 10px 0px;
    display: block;
    background-color: #333;
    color: #fff;
    overflow-x: auto;
    font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo, Lucida, Sans, Type, Writer, Ubuntu, Mono;
    border-radius: 5px;
    white-space: pre;
  }

  .show-info {
    margin-bottom: 50px;
  }

  .show-info h2 {
    line-height: 50px;
  }

  /*.title, .title:hover, .title-focus, .title:visited {
    color: black;
  }*/

  .title {
    display: block;
    text-decoration: none;
    text-align: center;
    line-height: 1.5;
    margin: 20px 0px;
    background-image: -webkit-linear-gradient(left,#3498db,#f47920 10%,#d71345 20%,#f7acbc 30%,#ffd400 40%,#3498db 50%,#f47920 60%,#d71345 70%,#f7acbc 80%,#ffd400 90%,#3498db);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 200% 100%;
    animation: slide 5s infinite linear;
    font-size: 40px;
  }

  .test {
    height: 500px;
  }

  .model {
    position: fixed;
    z-index: 10;
    width: 100vw;
    height: 100vh;
    overflow: auto;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.8);
  }

  .model-show {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
  }

  .model img {
    display: block;
    margin: auto;
    max-width: 80%;
    user-select: none;
    background-position: 0px 0px, 10px 10px;
    background-size: 20px 20px;
    background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee 100%),linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%);
  }

  .c-item {
    display: block;
    user-select: none;
  }

  @keyframes slide {
    0%  {
      background-position: 0 0;
    }
    100% {
      background-position: -100% 0;
    }
  }

</style>
